STA630 Research Methods GDB no 1 fall spring fall 14 November 2011

[Vuhelper]

Discussion Question

Both, the Moderating and Extraneous variables have an influence on the relationship between the dependent and independent variable. Discuss the basis on which we can differentiate moderating and extraneous variables?

[Vuhelper]

(Both, the Moderating and Extraneous variables have an influence on the relationshipbetween the dependent and independent variable. Discuss the basis on which we candifferentiate moderating and extraneous variables?)

Moderatingvariable:-
1- strong contingent effecton the independentvariable-dependentvariable relationship.
2-presence of a thirdvariable modifies theoriginal relationship
3-a moderator is aqualitative or quantitativein nature
4-Effect the direction andstrength of relationshipbetween predictor andcriterian variable
5-Moderator effects zeroorder correlation betweentwo variables
6-they don’t add error toexperiment.

ExtraneousVariables
1-conceivably affect on theindependent variable –dependent variablerelationship
2-To identify the truerelationship effect of theextraneous variables mayhave to be controlled
3-Confounding factors isanother nameused for extraneousvariables
4-Extraneous Variablesare undesirable variables
5-They influence theoutcome of an experiment
6- they add error to Read more: GDB of STA630 - Research Methods 1st - Virtual University of Pakistan http://vustudents.ning.com/group/sta630r...z1dqY63CW2

[Vuhelper]

Statement :
(Both, the Moderating and Extraneous variables have an influence on the relationship
between the dependent and independent variable. Discuss the basis on which we can
differentiate moderating and extraneous variables?)
Solution:
Moderating
variable
Extraneous
Variables
1- strong contingent effect
on the independent
variable-dependent
variable relationship.
1-conceivably affect on the
independent variable –
dependent variable
relationship
2-presence of a third
variable modifies the
original relationship
2-To identify the true
relationship effect of the
extraneous variables may
have to be controlled
3-a moderator is a
qualitative or quantitative
in nature
3-Confounding factors is
another name
used for extraneous
variables
4-Effect the direction and
strength of relationship
between predictor and
criterian variable
4-Extraneous Variables
are undesirable variables
5-Moderator effects zero
order correlation between
two variables
5-They influence the
outcome of an experiment
6-they don’t add error to
experiment.
6- they add error to an
experiment.